Skip to main content
OpenTrials
Not Yet Recruiting

NCT Number: NCT07666763

Influence of Acetal Resin Versus Nylon Elastic Cap on Crestal Bone Loss in Mandibular Implant-Supported Overdenture

Objective: To evaluate and compare the effect of two different attachment housing materials-Acetal Resin (Polyoxymethylene) versus conventional Nylon elastic caps-on marginal crestal bone loss around dental implants supporting a mandibular overdenture. It also evaluates peri-implant clinical tissue health by measuring pocket depth and the gingival bleeding index.

Not Yet Recruiting

Trial opening soon.

Get Notified

Key information

Conditions

Bone Loss Bone Diseases Bone Diseases, Metabolic Metabolic Diseases Mouth Diseases Musculoskeletal Diseases Nutritional and Metabolic Diseases Periodontal Diseases Periodontal Pocket Periodontitis Pocket, Periodontal Stomatognathic Diseases

Age range

40 year–60 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

About this study

Study Design & Timeline: A prospective, double-blind, randomized controlled clinical trial with a 1:1 allocation ratio. Clinical and radiographic outcomes will be evaluated at overdenture insertion (baseline), and at 6 and 12 months post-insertion.ethodology & Analysis: Pre-operative bone volume will be assessed via Cone Beam CT (CBCT). Crestal bone loss will be measured using the long cone parallel radiographic technique , while pocket depth and gingival bleeding will be measured using a William's graduated probing device. Data will undergo normality testing to determine the use of parametric (Independent t-test, Repeated Measures ANOVA) or non-parametric (Mann-Whitney, Friedman) statistical analyse

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Completely edentulous mandible.
  • Sufficient bone height/width in mandibular residual ridges.
  • Angles classification class I.
  • Sufficient inter-arch distance

Exclusion criteria

  • TMJ disorders.
  • Diabetic
  • Hypertensive
  • Cancer patients.
  • Smoker
  • Osteoporosis.
  • Immunosuppressive disease
  • Any disease affecting bone/implant stability.

Treatment and study plan

Acetal Resin

Device

overdenture supported by implants

nylon

Device

overdenture supported by implants

Primary outcomes

  1. Change in crestal bone levels

    Time frame: one year

    mm

Secondary outcomes

  1. pocket depth changes

    Time frame: one year

    mm

Sponsors and collaborators

Lead sponsor

Future University in Egypt

Other

Registry information

Acronym: AcetalResin

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Jun 24, 2026
Registry last updated
Jun 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.